Sten Lassmann (born 26 May 1982) is an Estonian pianist trained at the Tallinn Music High School, the Estonian Academy of Music, the Conservatoire de Paris and the Royal Academy of Music best known fo
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad4693774df67c0c2767781dbb89b24a1b99c0f21fe1a1c921ae95ff49f2b23. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32ce2319-2470-46c2-8951-a2d5c823fe0c.json and https://artists.proofprofile.net/proofs/artist/32ce2319-2470-46c2-8951-a2d5c823fe0c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).